package com.zeny.online.netty;

import io.netty.channel.Channel;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.handler.timeout.IdleState;
import io.netty.handler.timeout.IdleStateEvent;
import lombok.extern.slf4j.Slf4j;

/**
 * @ClassName HeartHandler
 * @Description 检测channel的心跳
 * @Author zeny
 */
@Slf4j
public class HeartHandler extends ChannelInboundHandlerAdapter {

    @Override
    public void userEventTriggered(ChannelHandlerContext ctx, Object evt) throws Exception {
        //判断evt是否是IdleStateEvent（用于触发用户事件，包含 读空闲/写空闲/读写空闲）
        if (evt instanceof IdleStateEvent) {
            IdleStateEvent event = (IdleStateEvent) evt;
            if (event.state() == IdleState.READER_IDLE) {
                log.info("进入读空闲");
            } else if (event.state() == IdleState.WRITER_IDLE) {
                log.info("进入写空闲");
            } else if (event.state() == IdleState.ALL_IDLE) {
                log.info("进入读写空闲");
                log.info("channel 关闭前, clients的数量: {}", ChatHandler.clients.size());
                Channel channel = ctx.channel();
                channel.close();
                log.info("channel 关闭后, clients的数量: {}", ChatHandler.clients.size());
            }
        }
    }
}
